13891137317 has 4 divisors (see below), whose sum is σ = 13891377900. Its totient is φ = 13890896736.

The previous prime is 13891137289. The next prime is 13891137391. The reversal of 13891137317 is 71373119831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71373119831 = 13 ⋅5490239987.

It can be written as a sum of positive squares in 2 ways, for example, as 11055681316 + 2835456001 = 105146^2 + 53249^2 .

It is a cyclic number.

It is not a de Polignac number, because 13891137317 - 2¹⁴ = 13891120933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13891137397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24059 + ... + 168407.

It is an arithmetic number, because the mean of its divisors is an integer number (3472844475).

It is a Poulet number, since it divides 2^13891137316-1.

Almost surely, 2^13891137317 is an apocalyptic number.

13891137317 is the 96233-rd pentagonal number.

It is an amenable number.

13891137317 is a deficient number, since it is larger than the sum of its proper divisors (240583).

13891137317 is an equidigital number, since it uses as much as digits as its factorization.

13891137317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240582.

The product of its digits is 95256, while the sum is 44.

The spelling of 13891137317 in words is "thirteen billion, eight hundred ninety-one million, one hundred thirty-seven thousand, three hundred seventeen".